Toasting bread in the oven typically causes moisture loss, which can result in the bread appearing slightly smaller or "shrunken" compared to its original size. However, the shrinkage is usually minimal and not very noticeable unless you're specifically comparing it side by side with untoasted bread.
When bread is toasted, the heat causes the moisture within the bread to evaporate. This moisture loss leads to the bread becoming drier and more brittle, resulting in a firmer texture. As a result, the bread may appear slightly smaller or denser due to the reduced moisture content.
It's worth noting that the degree of shrinkage can vary depending on the bread's type and initial moisture content. For example, denser bread with lower moisture levels might not shrink as much as softer, more moist bread.
Toasting bread in the oven can still provide a delicious, crispy result. Just be aware that there might be a slight reduction in size due to moisture loss during the toasting process.